SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bec0f885479d243c2854ae09eacaf6277649ff85960d75d6e7ee7b82319d283' 
  AND token = 'bPdVzvGwZjPiOMMl4+n7KVByNRw+uqJoSmDk2ej7Xjc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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