Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf3977f4cfe18fd5f1fe2ecf58bac3c3558c057f216d8af64ba69dd1dacea878' 
  AND token = 'BKoC1mmNcvhKyQV4WOd5TPUn2c+xmuUN4xkAss4AYqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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