Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be182f9bd50e76ff0feb27bec8b016763c8fd6780cdc49510219941a49010169' 
  AND token = 'fMMHG4upl2jdJZjuu9raL6vSc+aRTCBbvuSDE2PWvn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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