SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85b8df2df805637c410a2bc2a35616b0ef28b0b7877e17df347d2ac139d85dc7' 
  AND token = 'SN0jWEXpUU4RqcOFC/iPA63jiCCDaJW1wgi+M+s1V+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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