Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '826315938dcb268bf4d8fd570a8cf97e89a69ab1cbf6aae8e62d682e841eaeed' 
  AND token = 'Qv2To6lWxdxEqv4YPszTMZOF87Kz0nlm4MTQdmxbCA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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