SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca7f7ec959734d5cca4680242eb5340f79f99363abd3d8bf640b826b4e470592' 
  AND token = 'sT9wPhjwAZvxLpQDlerQOgJoaIgKxTQJ1HDNVdoTjeg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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