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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'decc8e73f461ea473f9f37030b6180c00fc999fb93c2cc68dc700dce838c1187' 
  AND token = 'C8mgCXcWak6LSvZH5nQVm/zH/fB/pn1nS5OS8mjOGMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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