Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfa9e5414d0feae9c5e099a6c022b86b57b3e618b76b3371eca542a1b61b5b21' 
  AND token = 'DfS6X+PPG/tGjNf42J9szeEsTzG9pwlA2igrTZgo14s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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