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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bdc99510e022c8a86d00060eab55c5a1dd74591b3898ef87cb9e5c15ea1e7248' 
  AND token = '3szG/aFcJ870xdG1rpOehamjInlZGn3K4Phhp3It8nU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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