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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a9f222d16cfaa6a9479a7e0db8f4a3dee8a004c49048523ef385e4de1df991f' 
  AND token = 'qywtAsGhBs4a0ik5au0BaVTuKwzBn07ndxifieCbeQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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