Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e70a9d55796897992341ed715be3a2c97dc14a54cd8dec6e6f76b5a25e294961' 
  AND token = 'HhwyQiTSSJ5J+JXkFLnZLmGPjX47+2ak71K4CAWExAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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