Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd277dfd727d7e5952e4a77ddda47733d07d33bdc436e4ed0a09666e90a5a1c6' 
  AND token = 'q+mGdr97M5Ruv5g1mhPbvOc1k0ExXXnNVWB/w1DysOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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