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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab24afc45c70899d82e601f61a9a64078dc2ceda7ca2cea6043d4e3d1628aa26' 
  AND token = 'kK+mpbNX038cA7jV2pNUcuvJ4kXmQipWpcLcldFAfMg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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