Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef6ff187b04352b27b83e31751dc76a8ce8c2a5946077418aa2ce1e4998b20e9' 
  AND token = 'HHZBC6Asc9UrBw2QEniq27Ds9yX0qgjrTwnFZ9tIqls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00083

JSON explain

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