Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09cd375d8c93a7964abf33f281950559e68454b4c7fa6a33fc06163b0ef0d709' 
  AND token = 'mvGOA5I5/3Sl9Ri6AStuuYc2fYn6rQoxmnYOmE4rgzM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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