Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d39f1a48a6320d79d63088d1bf6eaa518d98a0348662720e9da03eb24de9c9f' 
  AND token = 'J1Ek1+mDtT326HMLTtPjXjt+oFf4VcNlZZpwiqbnfBI=' 
  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"
    }
  }
}