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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72e2d260289bee141ff3a5abec5e8198295e76bd92b792a3ac0cb5175eca5b62' 
  AND token = 'CNojzQjw+fnY6/nvwDe6NS2ssXVK6jFEl8iWDMAuU5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00254

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}