Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fcf42306748260b4e8c0bf5886ef6a5f16598bd5b9571d9a2c18e0572b1738f' 
  AND token = 'BR4rWIT01BYGs093mNLRH67S7TZr6bK8Eobo0gE70Go=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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