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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3180158b166f73befe95b9bd56e8c766d45491b9b41de46fea3e057607933400' 
  AND token = 'kFawdBqYVU2/WG4WvfeW1p9oiE4CQNON8d96cleapLY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}