Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '636bd292de65decb8e2e20c2102ffc607605b3680ea625e3fbf3c9251b8627be' 
  AND token = 'V9oBxa30dibo7EBKoUI/MQ7Akna3Uv8Svjg05fK7RmQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}