Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9b2ca1c6951d004264d93deb45b1cc860e3d0dc219792249dafa949e8a603bb' 
  AND token = 'E1oWj0E87beFA4lscqEXkSZzhuY39yBWU2BzYWas6bw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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