Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b5a3317de897c6b9ae0a410367b77ab550602249b4f5fd0a0ca232497d9668a' 
  AND token = 'S8KEnA/IBtC+4Vr5Fq0Ds6XDOs+2Udy7AxCioab03lU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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