Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3253267f9daa9a91329032df6e668c6b9cd00f801a2fdd90e6f55eaf7316d441' 
  AND token = '5FkLCpzcIBWOXanbPZ9vfCDnuytGRjDGtoUZ6mNLDK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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