Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '792b765218cc859cdf1868b0be3b84c32f4c13c1c3f1e7d5d5ceada6cb97859d' 
  AND token = 'PyTyuOo9tCdlrr4bcTEm+391XLLhelfUiSPL+E52z1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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