Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86fc0d85c244f72ede1ca042d810b47827d350878a374e8a123e39a1a0d00c95' 
  AND token = '20XqyPfnGnuTG5SIs0jQusqzOAFUy0CNAUc5p5gyw9g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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