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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94bd5f452dae757ff52d8e674369521a5ef5b7ea7ea4c420948a5bc6865d49f9' 
  AND token = 'SM4CINj46psN4K772vXFb7HI+j0K9/F9+OYshvj73xY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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