Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16f9132f47887c9bf36845eff0121daceb34570286d0fd9ae40be9b0f565b5dd' 
  AND token = '4lfH4eDutAlYfy27ewpbhmUubKsJFgxPSvXS8oWUieE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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