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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '710751145bda72e0b4b5a8060dc3920774a70711bbbbd9d64992f663d84e5b33' 
  AND token = 'jV6CtqDugm7+XNXvRROsQ2Y/QDG7ObvYm0L0wAqu2kQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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