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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '87e06666b1b727ff85f7ef00cb4e9e46a1d16443ba2b65badf31b0d8a07860d7' 
  AND token = 'Jv25CzdFWIZlYX4a7QuduKBqsi6DaSIW0Bg0bnCZ1NU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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