Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90458ea4bad0fae20a32ccd18fbdc508c1e4c5620b52e74ec5ef047e43bef002' 
  AND token = 'CS53XHhr2a2tCD5aZiIyp8UP9E2lscnY4mqL0/h12QU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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