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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '09e9b9b3df890b431eda3cf207173af09e3ffea706fee0904c64271c3afaa33e' 
  AND token = 'vuX71QJSN9WypgGxetdLErovKh8O46ftlOP6R1H8LI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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