SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '107beae0280f87f342588470876a18623577ccd854dde593282a4ca4b5ddf8bb' 
  AND token = 'D9UT6gRqCxK/RvQbLS9KNDaPsMRXh+TIWA+6/TSQgJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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