Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd96a64fc785f10215d704fb3c4ac641ab412c4efc597b3cf86d2ac265bcf0477' 
  AND token = 'fAf9ZAUYTRqDMcturSdnz9+0T4jV9bW2gLgOoqT4eFc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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