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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd046a1c80d9f97e0947328b74470291ea0c5a91a6bf0446b9caa7f69f574aa38' 
  AND token = 'bgBKDpNr7Pjp93AqzVPXZ4rGBLn0oAHVgeLyxfl0G5s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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