SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70354747b29ded6d63270b42a1641665efafa2afbb241c557fc508b86ce82780' 
  AND token = 'wZJV3S9u5m09c/5n5r+mmiJOBjDcqFY1rK+SGKhjzV0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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