Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc8304464c1b1eb94f7da8725bc11ee89ff79a9b2202577080e105db349c1886' 
  AND token = 'Rob7QsM4H+PjQm6be0Cz2Vhv4iArEtew7tcrIIDwysg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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