Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87a7e3a8e4e27d5bc17616212e2508049384ed6cecda044b2057c67e40ece49c' 
  AND token = 'eGfECT8xxfnLxzUSa2csphFdoIFtwIVEb6P3n3z7v68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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