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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e050afa5beaa3f13ebaf4d105fbc004ca617de2c98748f734a4a15587651add' 
  AND token = 'BNIlA1dqM3LHLxzY6rmOZ2pO5uHeZY/w5QHAo4RQWlE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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