Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be741c44a87741787accf8c2a93713bf4d4879792c887a0e1aa9d34227aebe50' 
  AND token = '42ktqPvfMZGxUZPAmbEX1ami1CKYBQsyJ7XmwI7xjWg=' 
  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"
    }
  }
}