Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96259fc7af761d0822c6311870523057bb29b0f60c97b75da5bfe3c595ec4e46' 
  AND token = 'Asd5n7pEvhCHTG3plGnOPFR79YYVnTk4PitpuDbLS2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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