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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1b6da31a1164c578e1858f6654ca18ad417bdf75a8dbbe8873a33ed5811ac1d' 
  AND token = 'HhbC8jU/fZAg0K6wz5apfCGo98O5mJ6hj1SowvcSx0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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