Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1dd8c552449a876bef4967fc67029d285c73ad1ca6d800577ba74cb34e8d377' 
  AND token = 'lV40P+Odq1y2TLUoSLCyV7d49n0a5UXN/SrooLX7d4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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