Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7f4373ef8545de193d055aaf285816c8d3e41653dc1898493c7319ca5b945d7' 
  AND token = 'Sxzcj80RjJQQaD6z1nwviILz+h7D5Li0loO06QhpgLo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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