Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3806230837f32e6f549292b84c5bc3aaa9cf2473d74b4c65b206d3032a69ac9' 
  AND token = 'G+mOxeNLP9CV2Cdp74RFHhsFqaymLZioV+KkzWSaCjQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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