Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2cceec5df87a8cad7fcf5fa825b8482e2eb95f7b7b0b4bec7a5d1e3c7aded27' 
  AND token = 'hkSPZMKlrOpQs2HhywywctZpp6OYn7cq5SKsA7hXuMk=' 
  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"
    }
  }
}