Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e675fba8d402fdd7d3f927e1554e9766ad0c8c1e503e626cd5bf2977f65f6613' 
  AND token = 'H4QarMW590t2ZyXxjPMBZcgQcnqA3x2RwDGDSVfHe1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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