Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91bcbdd33bc1a0c0e426f7902c9643da2a2c900f5bce79246e8397ab7fc1976f' 
  AND token = 'PtiioO1dvpm2al5ZK2qyNxUwfv5o+6IrDe6b4stLYv8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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