Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b52ece32ca62f0094f64a78e945075e62ec58365c6f35bff454c4c83fcf61b9' 
  AND token = 'G37K9PEcwDMIlGA+h1Am0wkTg6AUrgoDafxlhcj4624=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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