SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b676daf7f58b0e44ba313df54529a80dc8c34d9354aae07518509978ae77a969' 
  AND token = 'AsRe/v72D6uxzojY6DCvq6FyG/K1vJEhipYawbDWz2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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