Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52d0fa4189666981eaf73bd8afa55ff890b143aaacd242f527ac4673608f0fcb' 
  AND token = 'PO3A7BJcIU2uSAbkS6v6O0xSiNjQN8kId35OZzzyVTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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