Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb033a6c8cc67aa7b500ed058e8a2c8795fbc8040e0e5667de10a4ca623aa44c' 
  AND token = 'IovE39obVmMGFP5xjRQQ8uMfXke+z3l6iwHQaP5JyQo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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