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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7db957b048d81256143753876a7541aae6eee3b4a80a25d8152701192ba64ba8' 
  AND token = 'bw1pxAir2hMKRZmMb9ItPWmE5P2P31R3DSSC+H2WgNg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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