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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '775c2baacc705277d3556636e84a4c12568622ce765e35ebbc1bf6f8c85bd09a' 
  AND token = 'Hbs7nqr980OIN9fnLGg37r3qN83VnXub7oA26LhRkuM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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