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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eba8b999ffe2e2de2e55dc09f1b0067ce76eff4bde91fc1aec13eeca31488eba' 
  AND token = 'Om/RliSeWBSj7ZrL7aF3Grn/uFYbOaYgMQ25rZ0rXYs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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