Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd54ed7c68554b5efd5d3a346f8d071b709cde7f919f5410d4989e4c58352e4e' 
  AND token = 'E81/a8ulCyVaE4qzC/DtSDVgx+Clg/m60yHmS1CAECE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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