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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33173c38dc5986b4c6d93697ee7e0774a4e6f0a4e191df16dbdf1dcea8e4a471' 
  AND token = '235Hgtg6kebTF79UDYOdO2JPHOU6QSg6RQjH4bj1kHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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