Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a41fb7eac43eff8a0a6309b7ec32e6d16ea8ad2b63bf080cc41b1986a675efa9' 
  AND token = 'AhYOmyMsPLY6NKN5DOpE/CzhM4yB1nEmx6FmXB6mCGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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