Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e46af33f2234de1eee389eb383af322f83cfa4ab2b9bc145cccfb20cea1051a9' 
  AND token = 'ArT20QO8Q8AE+y6UNbpgSC1fRQOeTjtARGnhSznePAY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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