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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05129bbddb0a1e4f2e2c665774841c807c820757f55aa86c89ec4428610c0a94' 
  AND token = 'EGP3A4AIsOq9Nr8Ij1EFY8fk4c4p27eI5HV7uiv67iU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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