Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05d9e570e34047071531a143350e61fbe1eb631b1ea2196909deb8abdc5b6e12' 
  AND token = '1+xjkBZ3HT6VQpH0e2Cirj0hwXspykR40cwFitEmWdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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