Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0311a1eb45940392ad45d6a6ba83a62f420e265048f64f48d1db5481a888656b' 
  AND token = 'rrwT6NW5z+Qf8zOIohndnUbj4S8YH4jsvKHnWfF8r6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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