Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fec43956e39b67445d811d5c084388954837dd8321de9e61e7ace9d32395e626' 
  AND token = 'jj3XJqUUCmtIzjooDE0fs73wcEiZhflCyIJNcpxOIBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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