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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd7634cb4e478df2d582b9f09ee8182799702095fcb2dfbaa5f38d4e72222c395' 
  AND token = 'KoOF/cUDPCdSB8p2w5hNfGMQvoo1dm9J29/AE2dIbms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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