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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '635a88169025c6f2972d240e161313bd3047e3ea84dca4a1f7f5b0a0c5b18e90' 
  AND token = 'dvbs632J3tTIPslgz8PgFiTMHr8E1UHokqq+8YkDeDU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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