Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '587be32af1aa9dba7cf374fa12cfd1b0ae781cdeeb80a86c2a0164e67e37b603' 
  AND token = 'zbsybzUHOzs22tW94YPdS2v3aNtFaV3et0ESPUl9plY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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