Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '786323e7400b8054bfbdf827c95665e2b833651c278f500d3bd0cd0584baaf42' 
  AND token = 'TNZmA0R4Q2RL9l8Kkc6CWE1syH3pNZ33xaFr+nZuG08=' 
  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"
    }
  }
}