Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '026fffc04388d1f943b09578aaf32d6613c430461b9536f299f82c2587bad395' 
  AND token = 'Nm+dtr4EmRMCrd+tWYLILpy0hs7b2cgAnxFDWYa2rSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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