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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebb5aff7f6e99125b53b4e1263fa1cf1febfcccac3951f15de7d387b47e0cbbb' 
  AND token = 'q7xB2UJaRxvR/OsqDn54ygGp7ObD1BP52dW0vZ7pcYQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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