Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d2caa34d729b60d1eae2609d1dafecfdadc061b9784991817509f1fe3c06658' 
  AND token = '9Xp39p6glpWBAc5JWqUHkqEyFfs8BIyIvGKmy7DJ9Ko=' 
  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"
    }
  }
}