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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a722e76c60c3da9633bbfb7e91e86537bfc429524fcecf1acd410be7d981aed' 
  AND token = 'mf7bYwxUOLAvj2tq7m1irHglNUhbZfC4Bc4ZaC4cYzw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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