Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c78401fea6ecc93301086ab60027af26e664a742fef02dda75d652068e0f739' 
  AND token = 'p4vLohFFipqEw8vism2Aa19oraaPG3QsQsxfiVSIKtI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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