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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0963ac364d31312b3a6a3426d149da104a1360a38a667e13a83d1789c8de5827' 
  AND token = 'nyVe+5DtYf/GV5SNn6g7CqN1TEOZocvhOwB08tq1MJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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