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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fadafa976aecc335ce7341ac8f6e05e60e0575ee22f993ec029b896ac9ad93e' 
  AND token = 'g6WIwh4TI8jCfC5sDPPGLBtK/tissFsz1+++5YV+W9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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