Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1d98c72ea70d6413e189d1a1128952ef09ab7d41bb478353eb5e8c56b94b564' 
  AND token = 'OErcknGU2TU5agtu1l/MlHZCaJwgjfJHaPjcxs2S9k8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}