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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2aa1633bb25e4ce0963eae55c2b18470ced6e0f7e45b8c9d863d8341a95f6c5f' 
  AND token = '+sI8iO2RKwlz8HF71VtouKX8uwFjVZcnx8kyrOAiJUE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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