Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19260a3e8058b97696d16d2e6018d6a247c0865ccf2bb9da70baae6599004288' 
  AND token = 'fAME6yzK9VLoYhuB/wJir2TP97LSsS7pcsy0O+OPzjQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}